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a10e763b | 1 | // SPDX-License-Identifier: GPL-2.0-only |
3a3748db HZ |
2 | /* |
3 | * Driver for Marvell Xenon SDHC as a platform device | |
4 | * | |
5 | * Copyright (C) 2016 Marvell, All Rights Reserved. | |
6 | * | |
7 | * Author: Hu Ziji <huziji@marvell.com> | |
8 | * Date: 2016-8-24 | |
9 | * | |
3a3748db HZ |
10 | * Inspired by Jisheng Zhang <jszhang@marvell.com> |
11 | * Special thanks to Video BG4 project team. | |
12 | */ | |
13 | ||
471cf454 | 14 | #include <linux/acpi.h> |
3a3748db HZ |
15 | #include <linux/delay.h> |
16 | #include <linux/ktime.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/of.h> | |
a027b2c5 ZW |
19 | #include <linux/pm.h> |
20 | #include <linux/pm_runtime.h> | |
3a3748db HZ |
21 | |
22 | #include "sdhci-pltfm.h" | |
23 | #include "sdhci-xenon.h" | |
24 | ||
25 | static int xenon_enable_internal_clk(struct sdhci_host *host) | |
26 | { | |
27 | u32 reg; | |
28 | ktime_t timeout; | |
29 | ||
30 | reg = sdhci_readl(host, SDHCI_CLOCK_CONTROL); | |
31 | reg |= SDHCI_CLOCK_INT_EN; | |
32 | sdhci_writel(host, reg, SDHCI_CLOCK_CONTROL); | |
33 | /* Wait max 20 ms */ | |
34 | timeout = ktime_add_ms(ktime_get(), 20); | |
0e6e7c2f AH |
35 | while (1) { |
36 | bool timedout = ktime_after(ktime_get(), timeout); | |
37 | ||
38 | reg = sdhci_readw(host, SDHCI_CLOCK_CONTROL); | |
39 | if (reg & SDHCI_CLOCK_INT_STABLE) | |
40 | break; | |
41 | if (timedout) { | |
3a3748db HZ |
42 | dev_err(mmc_dev(host->mmc), "Internal clock never stabilised.\n"); |
43 | return -ETIMEDOUT; | |
44 | } | |
45 | usleep_range(900, 1100); | |
46 | } | |
47 | ||
48 | return 0; | |
49 | } | |
50 | ||
51 | /* Set SDCLK-off-while-idle */ | |
52 | static void xenon_set_sdclk_off_idle(struct sdhci_host *host, | |
53 | unsigned char sdhc_id, bool enable) | |
54 | { | |
55 | u32 reg; | |
56 | u32 mask; | |
57 | ||
58 | reg = sdhci_readl(host, XENON_SYS_OP_CTRL); | |
59 | /* Get the bit shift basing on the SDHC index */ | |
60 | mask = (0x1 << (XENON_SDCLK_IDLEOFF_ENABLE_SHIFT + sdhc_id)); | |
61 | if (enable) | |
62 | reg |= mask; | |
63 | else | |
64 | reg &= ~mask; | |
65 | ||
66 | sdhci_writel(host, reg, XENON_SYS_OP_CTRL); | |
67 | } | |
68 | ||
69 | /* Enable/Disable the Auto Clock Gating function */ | |
70 | static void xenon_set_acg(struct sdhci_host *host, bool enable) | |
71 | { | |
72 | u32 reg; | |
73 | ||
74 | reg = sdhci_readl(host, XENON_SYS_OP_CTRL); | |
75 | if (enable) | |
76 | reg &= ~XENON_AUTO_CLKGATE_DISABLE_MASK; | |
77 | else | |
78 | reg |= XENON_AUTO_CLKGATE_DISABLE_MASK; | |
79 | sdhci_writel(host, reg, XENON_SYS_OP_CTRL); | |
80 | } | |
81 | ||
82 | /* Enable this SDHC */ | |
83 | static void xenon_enable_sdhc(struct sdhci_host *host, | |
84 | unsigned char sdhc_id) | |
85 | { | |
86 | u32 reg; | |
87 | ||
88 | reg = sdhci_readl(host, XENON_SYS_OP_CTRL); | |
89 | reg |= (BIT(sdhc_id) << XENON_SLOT_ENABLE_SHIFT); | |
90 | sdhci_writel(host, reg, XENON_SYS_OP_CTRL); | |
91 | ||
92 | host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; | |
93 | /* | |
94 | * Force to clear BUS_TEST to | |
95 | * skip bus_test_pre and bus_test_post | |
96 | */ | |
97 | host->mmc->caps &= ~MMC_CAP_BUS_WIDTH_TEST; | |
98 | } | |
99 | ||
100 | /* Disable this SDHC */ | |
101 | static void xenon_disable_sdhc(struct sdhci_host *host, | |
102 | unsigned char sdhc_id) | |
103 | { | |
104 | u32 reg; | |
105 | ||
106 | reg = sdhci_readl(host, XENON_SYS_OP_CTRL); | |
107 | reg &= ~(BIT(sdhc_id) << XENON_SLOT_ENABLE_SHIFT); | |
108 | sdhci_writel(host, reg, XENON_SYS_OP_CTRL); | |
109 | } | |
110 | ||
111 | /* Enable Parallel Transfer Mode */ | |
112 | static void xenon_enable_sdhc_parallel_tran(struct sdhci_host *host, | |
113 | unsigned char sdhc_id) | |
114 | { | |
115 | u32 reg; | |
116 | ||
117 | reg = sdhci_readl(host, XENON_SYS_EXT_OP_CTRL); | |
118 | reg |= BIT(sdhc_id); | |
119 | sdhci_writel(host, reg, XENON_SYS_EXT_OP_CTRL); | |
120 | } | |
121 | ||
122 | /* Mask command conflict error */ | |
123 | static void xenon_mask_cmd_conflict_err(struct sdhci_host *host) | |
124 | { | |
125 | u32 reg; | |
126 | ||
127 | reg = sdhci_readl(host, XENON_SYS_EXT_OP_CTRL); | |
128 | reg |= XENON_MASK_CMD_CONFLICT_ERR; | |
129 | sdhci_writel(host, reg, XENON_SYS_EXT_OP_CTRL); | |
130 | } | |
131 | ||
132 | static void xenon_retune_setup(struct sdhci_host *host) | |
133 | { | |
134 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
135 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
136 | u32 reg; | |
137 | ||
138 | /* Disable the Re-Tuning Request functionality */ | |
139 | reg = sdhci_readl(host, XENON_SLOT_RETUNING_REQ_CTRL); | |
140 | reg &= ~XENON_RETUNING_COMPATIBLE; | |
141 | sdhci_writel(host, reg, XENON_SLOT_RETUNING_REQ_CTRL); | |
142 | ||
143 | /* Disable the Re-tuning Interrupt */ | |
144 | reg = sdhci_readl(host, SDHCI_SIGNAL_ENABLE); | |
145 | reg &= ~SDHCI_INT_RETUNE; | |
146 | sdhci_writel(host, reg, SDHCI_SIGNAL_ENABLE); | |
147 | reg = sdhci_readl(host, SDHCI_INT_ENABLE); | |
148 | reg &= ~SDHCI_INT_RETUNE; | |
149 | sdhci_writel(host, reg, SDHCI_INT_ENABLE); | |
150 | ||
151 | /* Force to use Tuning Mode 1 */ | |
152 | host->tuning_mode = SDHCI_TUNING_MODE_1; | |
153 | /* Set re-tuning period */ | |
154 | host->tuning_count = 1 << (priv->tuning_count - 1); | |
155 | } | |
156 | ||
157 | /* | |
158 | * Operations inside struct sdhci_ops | |
159 | */ | |
160 | /* Recover the Register Setting cleared during SOFTWARE_RESET_ALL */ | |
161 | static void xenon_reset_exit(struct sdhci_host *host, | |
162 | unsigned char sdhc_id, u8 mask) | |
163 | { | |
164 | /* Only SOFTWARE RESET ALL will clear the register setting */ | |
165 | if (!(mask & SDHCI_RESET_ALL)) | |
166 | return; | |
167 | ||
168 | /* Disable tuning request and auto-retuning again */ | |
169 | xenon_retune_setup(host); | |
170 | ||
1a3ed0dc AL |
171 | /* |
172 | * The ACG should be turned off at the early init time, in order | |
173 | * to solve a possible issues with the 1.8V regulator stabilization. | |
174 | * The feature is enabled in later stage. | |
175 | */ | |
176 | xenon_set_acg(host, false); | |
3a3748db HZ |
177 | |
178 | xenon_set_sdclk_off_idle(host, sdhc_id, false); | |
179 | ||
180 | xenon_mask_cmd_conflict_err(host); | |
181 | } | |
182 | ||
183 | static void xenon_reset(struct sdhci_host *host, u8 mask) | |
184 | { | |
185 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
186 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
187 | ||
188 | sdhci_reset(host, mask); | |
189 | xenon_reset_exit(host, priv->sdhc_id, mask); | |
190 | } | |
191 | ||
192 | /* | |
193 | * Xenon defines different values for HS200 and HS400 | |
194 | * in Host_Control_2 | |
195 | */ | |
196 | static void xenon_set_uhs_signaling(struct sdhci_host *host, | |
197 | unsigned int timing) | |
198 | { | |
199 | u16 ctrl_2; | |
200 | ||
201 | ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
202 | /* Select Bus Speed Mode for host */ | |
203 | ctrl_2 &= ~SDHCI_CTRL_UHS_MASK; | |
204 | if (timing == MMC_TIMING_MMC_HS200) | |
205 | ctrl_2 |= XENON_CTRL_HS200; | |
206 | else if (timing == MMC_TIMING_UHS_SDR104) | |
207 | ctrl_2 |= SDHCI_CTRL_UHS_SDR104; | |
208 | else if (timing == MMC_TIMING_UHS_SDR12) | |
209 | ctrl_2 |= SDHCI_CTRL_UHS_SDR12; | |
210 | else if (timing == MMC_TIMING_UHS_SDR25) | |
211 | ctrl_2 |= SDHCI_CTRL_UHS_SDR25; | |
212 | else if (timing == MMC_TIMING_UHS_SDR50) | |
213 | ctrl_2 |= SDHCI_CTRL_UHS_SDR50; | |
214 | else if ((timing == MMC_TIMING_UHS_DDR50) || | |
215 | (timing == MMC_TIMING_MMC_DDR52)) | |
216 | ctrl_2 |= SDHCI_CTRL_UHS_DDR50; | |
217 | else if (timing == MMC_TIMING_MMC_HS400) | |
218 | ctrl_2 |= XENON_CTRL_HS400; | |
219 | sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2); | |
220 | } | |
221 | ||
99c14fc3 ZW |
222 | static void xenon_set_power(struct sdhci_host *host, unsigned char mode, |
223 | unsigned short vdd) | |
224 | { | |
225 | struct mmc_host *mmc = host->mmc; | |
226 | u8 pwr = host->pwr; | |
227 | ||
228 | sdhci_set_power_noreg(host, mode, vdd); | |
229 | ||
230 | if (host->pwr == pwr) | |
231 | return; | |
232 | ||
233 | if (host->pwr == 0) | |
234 | vdd = 0; | |
235 | ||
236 | if (!IS_ERR(mmc->supply.vmmc)) | |
237 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); | |
238 | } | |
239 | ||
8d876bf4 ZW |
240 | static void xenon_voltage_switch(struct sdhci_host *host) |
241 | { | |
242 | /* Wait for 5ms after set 1.8V signal enable bit */ | |
243 | usleep_range(5000, 5500); | |
244 | } | |
245 | ||
15424880 MW |
246 | static unsigned int xenon_get_max_clock(struct sdhci_host *host) |
247 | { | |
248 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
249 | ||
250 | if (pltfm_host->clk) | |
251 | return sdhci_pltfm_clk_get_max_clock(host); | |
252 | else | |
253 | return pltfm_host->clock; | |
254 | } | |
255 | ||
3a3748db | 256 | static const struct sdhci_ops sdhci_xenon_ops = { |
8d876bf4 | 257 | .voltage_switch = xenon_voltage_switch, |
3a3748db | 258 | .set_clock = sdhci_set_clock, |
99c14fc3 | 259 | .set_power = xenon_set_power, |
3a3748db HZ |
260 | .set_bus_width = sdhci_set_bus_width, |
261 | .reset = xenon_reset, | |
262 | .set_uhs_signaling = xenon_set_uhs_signaling, | |
15424880 | 263 | .get_max_clock = xenon_get_max_clock, |
3a3748db HZ |
264 | }; |
265 | ||
266 | static const struct sdhci_pltfm_data sdhci_xenon_pdata = { | |
267 | .ops = &sdhci_xenon_ops, | |
268 | .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC | | |
269 | SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER | | |
270 | SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN, | |
271 | }; | |
272 | ||
273 | /* | |
274 | * Xenon Specific Operations in mmc_host_ops | |
275 | */ | |
276 | static void xenon_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
277 | { | |
278 | struct sdhci_host *host = mmc_priv(mmc); | |
279 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
280 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
281 | u32 reg; | |
282 | ||
283 | /* | |
284 | * HS400/HS200/eMMC HS doesn't have Preset Value register. | |
285 | * However, sdhci_set_ios will read HS400/HS200 Preset register. | |
286 | * Disable Preset Value register for HS400/HS200. | |
287 | * eMMC HS with preset_enabled set will trigger a bug in | |
288 | * get_preset_value(). | |
289 | */ | |
290 | if ((ios->timing == MMC_TIMING_MMC_HS400) || | |
291 | (ios->timing == MMC_TIMING_MMC_HS200) || | |
292 | (ios->timing == MMC_TIMING_MMC_HS)) { | |
293 | host->preset_enabled = false; | |
294 | host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN; | |
295 | host->flags &= ~SDHCI_PV_ENABLED; | |
296 | ||
297 | reg = sdhci_readw(host, SDHCI_HOST_CONTROL2); | |
298 | reg &= ~SDHCI_CTRL_PRESET_VAL_ENABLE; | |
299 | sdhci_writew(host, reg, SDHCI_HOST_CONTROL2); | |
300 | } else { | |
301 | host->quirks2 &= ~SDHCI_QUIRK2_PRESET_VALUE_BROKEN; | |
302 | } | |
303 | ||
304 | sdhci_set_ios(mmc, ios); | |
06c8b667 | 305 | xenon_phy_adj(host, ios); |
3a3748db HZ |
306 | |
307 | if (host->clock > XENON_DEFAULT_SDCLK_FREQ) | |
308 | xenon_set_sdclk_off_idle(host, priv->sdhc_id, true); | |
309 | } | |
310 | ||
311 | static int xenon_start_signal_voltage_switch(struct mmc_host *mmc, | |
312 | struct mmc_ios *ios) | |
313 | { | |
314 | struct sdhci_host *host = mmc_priv(mmc); | |
315 | ||
316 | /* | |
317 | * Before SD/SDIO set signal voltage, SD bus clock should be | |
318 | * disabled. However, sdhci_set_clock will also disable the Internal | |
319 | * clock in mmc_set_signal_voltage(). | |
320 | * If Internal clock is disabled, the 3.3V/1.8V bit can not be updated. | |
321 | * Thus here manually enable internal clock. | |
322 | * | |
323 | * After switch completes, it is unnecessary to disable internal clock, | |
324 | * since keeping internal clock active obeys SD spec. | |
325 | */ | |
326 | xenon_enable_internal_clk(host); | |
327 | ||
298269c6 HZ |
328 | xenon_soc_pad_ctrl(host, ios->signal_voltage); |
329 | ||
3a3748db HZ |
330 | /* |
331 | * If Vqmmc is fixed on platform, vqmmc regulator should be unavailable. | |
332 | * Thus SDHCI_CTRL_VDD_180 bit might not work then. | |
333 | * Skip the standard voltage switch to avoid any issue. | |
334 | */ | |
335 | if (PTR_ERR(mmc->supply.vqmmc) == -ENODEV) | |
336 | return 0; | |
337 | ||
338 | return sdhci_start_signal_voltage_switch(mmc, ios); | |
339 | } | |
340 | ||
341 | /* | |
342 | * Update card type. | |
343 | * priv->init_card_type will be used in PHY timing adjustment. | |
344 | */ | |
345 | static void xenon_init_card(struct mmc_host *mmc, struct mmc_card *card) | |
346 | { | |
347 | struct sdhci_host *host = mmc_priv(mmc); | |
348 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
349 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
350 | ||
351 | /* Update card type*/ | |
352 | priv->init_card_type = card->type; | |
353 | } | |
354 | ||
355 | static int xenon_execute_tuning(struct mmc_host *mmc, u32 opcode) | |
356 | { | |
357 | struct sdhci_host *host = mmc_priv(mmc); | |
358 | ||
468c6483 ZW |
359 | if (host->timing == MMC_TIMING_UHS_DDR50 || |
360 | host->timing == MMC_TIMING_MMC_DDR52) | |
3a3748db HZ |
361 | return 0; |
362 | ||
363 | /* | |
364 | * Currently force Xenon driver back to support mode 1 only, | |
365 | * even though Xenon might claim to support mode 2 or mode 3. | |
366 | * It requires more time to test mode 2/mode 3 on more platforms. | |
367 | */ | |
368 | if (host->tuning_mode != SDHCI_TUNING_MODE_1) | |
369 | xenon_retune_setup(host); | |
370 | ||
371 | return sdhci_execute_tuning(mmc, opcode); | |
372 | } | |
373 | ||
374 | static void xenon_enable_sdio_irq(struct mmc_host *mmc, int enable) | |
375 | { | |
376 | struct sdhci_host *host = mmc_priv(mmc); | |
377 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
378 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
379 | u32 reg; | |
380 | u8 sdhc_id = priv->sdhc_id; | |
381 | ||
382 | sdhci_enable_sdio_irq(mmc, enable); | |
383 | ||
384 | if (enable) { | |
385 | /* | |
386 | * Set SDIO Card Inserted indication | |
387 | * to enable detecting SDIO async irq. | |
388 | */ | |
389 | reg = sdhci_readl(host, XENON_SYS_CFG_INFO); | |
390 | reg |= (1 << (sdhc_id + XENON_SLOT_TYPE_SDIO_SHIFT)); | |
391 | sdhci_writel(host, reg, XENON_SYS_CFG_INFO); | |
392 | } else { | |
393 | /* Clear SDIO Card Inserted indication */ | |
394 | reg = sdhci_readl(host, XENON_SYS_CFG_INFO); | |
395 | reg &= ~(1 << (sdhc_id + XENON_SLOT_TYPE_SDIO_SHIFT)); | |
396 | sdhci_writel(host, reg, XENON_SYS_CFG_INFO); | |
397 | } | |
398 | } | |
399 | ||
400 | static void xenon_replace_mmc_host_ops(struct sdhci_host *host) | |
401 | { | |
402 | host->mmc_host_ops.set_ios = xenon_set_ios; | |
403 | host->mmc_host_ops.start_signal_voltage_switch = | |
404 | xenon_start_signal_voltage_switch; | |
405 | host->mmc_host_ops.init_card = xenon_init_card; | |
406 | host->mmc_host_ops.execute_tuning = xenon_execute_tuning; | |
407 | host->mmc_host_ops.enable_sdio_irq = xenon_enable_sdio_irq; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Parse Xenon specific DT properties: | |
412 | * sdhc-id: the index of current SDHC. | |
413 | * Refer to XENON_SYS_CFG_INFO register | |
414 | * tun-count: the interval between re-tuning | |
415 | */ | |
f29bf660 | 416 | static int xenon_probe_params(struct platform_device *pdev) |
3a3748db | 417 | { |
f29bf660 | 418 | struct device *dev = &pdev->dev; |
3a3748db HZ |
419 | struct sdhci_host *host = platform_get_drvdata(pdev); |
420 | struct mmc_host *mmc = host->mmc; | |
421 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
422 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
423 | u32 sdhc_id, nr_sdhc; | |
424 | u32 tuning_count; | |
425 | ||
426 | /* Disable HS200 on Armada AP806 */ | |
f75fda37 | 427 | if (priv->hw_version == XENON_AP806) |
3a3748db HZ |
428 | host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200; |
429 | ||
430 | sdhc_id = 0x0; | |
f29bf660 | 431 | if (!device_property_read_u32(dev, "marvell,xenon-sdhc-id", &sdhc_id)) { |
3a3748db HZ |
432 | nr_sdhc = sdhci_readl(host, XENON_SYS_CFG_INFO); |
433 | nr_sdhc &= XENON_NR_SUPPORTED_SLOT_MASK; | |
434 | if (unlikely(sdhc_id > nr_sdhc)) { | |
435 | dev_err(mmc_dev(mmc), "SDHC Index %d exceeds Number of SDHCs %d\n", | |
436 | sdhc_id, nr_sdhc); | |
437 | return -EINVAL; | |
438 | } | |
439 | } | |
440 | priv->sdhc_id = sdhc_id; | |
441 | ||
442 | tuning_count = XENON_DEF_TUNING_COUNT; | |
f29bf660 MW |
443 | if (!device_property_read_u32(dev, "marvell,xenon-tun-count", |
444 | &tuning_count)) { | |
3a3748db HZ |
445 | if (unlikely(tuning_count >= XENON_TMR_RETUN_NO_PRESENT)) { |
446 | dev_err(mmc_dev(mmc), "Wrong Re-tuning Count. Set default value %d\n", | |
447 | XENON_DEF_TUNING_COUNT); | |
448 | tuning_count = XENON_DEF_TUNING_COUNT; | |
449 | } | |
450 | } | |
451 | priv->tuning_count = tuning_count; | |
452 | ||
f29bf660 | 453 | return xenon_phy_parse_params(dev, host); |
3a3748db HZ |
454 | } |
455 | ||
456 | static int xenon_sdhc_prepare(struct sdhci_host *host) | |
457 | { | |
458 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
459 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
460 | u8 sdhc_id = priv->sdhc_id; | |
461 | ||
462 | /* Enable SDHC */ | |
463 | xenon_enable_sdhc(host, sdhc_id); | |
464 | ||
465 | /* Enable ACG */ | |
466 | xenon_set_acg(host, true); | |
467 | ||
468 | /* Enable Parallel Transfer Mode */ | |
469 | xenon_enable_sdhc_parallel_tran(host, sdhc_id); | |
470 | ||
471 | /* Disable SDCLK-Off-While-Idle before card init */ | |
472 | xenon_set_sdclk_off_idle(host, sdhc_id, false); | |
473 | ||
474 | xenon_mask_cmd_conflict_err(host); | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | static void xenon_sdhc_unprepare(struct sdhci_host *host) | |
480 | { | |
481 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
482 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
483 | u8 sdhc_id = priv->sdhc_id; | |
484 | ||
485 | /* disable SDHC */ | |
486 | xenon_disable_sdhc(host, sdhc_id); | |
487 | } | |
488 | ||
489 | static int xenon_probe(struct platform_device *pdev) | |
490 | { | |
491 | struct sdhci_pltfm_host *pltfm_host; | |
15424880 | 492 | struct device *dev = &pdev->dev; |
3a3748db | 493 | struct sdhci_host *host; |
bb16ea17 | 494 | struct xenon_priv *priv; |
3a3748db HZ |
495 | int err; |
496 | ||
497 | host = sdhci_pltfm_init(pdev, &sdhci_xenon_pdata, | |
498 | sizeof(struct xenon_priv)); | |
499 | if (IS_ERR(host)) | |
500 | return PTR_ERR(host); | |
501 | ||
502 | pltfm_host = sdhci_priv(host); | |
bb16ea17 | 503 | priv = sdhci_pltfm_priv(pltfm_host); |
3a3748db | 504 | |
f75fda37 MW |
505 | priv->hw_version = (unsigned long)device_get_match_data(&pdev->dev); |
506 | ||
3a3748db HZ |
507 | /* |
508 | * Link Xenon specific mmc_host_ops function, | |
509 | * to replace standard ones in sdhci_ops. | |
510 | */ | |
511 | xenon_replace_mmc_host_ops(host); | |
512 | ||
15424880 MW |
513 | if (dev->of_node) { |
514 | pltfm_host->clk = devm_clk_get(&pdev->dev, "core"); | |
515 | if (IS_ERR(pltfm_host->clk)) { | |
516 | err = PTR_ERR(pltfm_host->clk); | |
517 | dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err); | |
518 | goto free_pltfm; | |
519 | } | |
520 | err = clk_prepare_enable(pltfm_host->clk); | |
bb16ea17 | 521 | if (err) |
15424880 MW |
522 | goto free_pltfm; |
523 | ||
524 | priv->axi_clk = devm_clk_get(&pdev->dev, "axi"); | |
525 | if (IS_ERR(priv->axi_clk)) { | |
526 | err = PTR_ERR(priv->axi_clk); | |
527 | if (err == -EPROBE_DEFER) | |
528 | goto err_clk; | |
529 | } else { | |
530 | err = clk_prepare_enable(priv->axi_clk); | |
531 | if (err) | |
532 | goto err_clk; | |
533 | } | |
bb16ea17 GC |
534 | } |
535 | ||
3a3748db HZ |
536 | err = mmc_of_parse(host->mmc); |
537 | if (err) | |
bb16ea17 | 538 | goto err_clk_axi; |
3a3748db | 539 | |
f29bf660 | 540 | sdhci_get_property(pdev); |
3a3748db HZ |
541 | |
542 | xenon_set_acg(host, false); | |
543 | ||
f29bf660 MW |
544 | /* Xenon specific parameters parse */ |
545 | err = xenon_probe_params(pdev); | |
3a3748db | 546 | if (err) |
bb16ea17 | 547 | goto err_clk_axi; |
3a3748db HZ |
548 | |
549 | err = xenon_sdhc_prepare(host); | |
550 | if (err) | |
bb16ea17 | 551 | goto err_clk_axi; |
3a3748db | 552 | |
a027b2c5 ZW |
553 | pm_runtime_get_noresume(&pdev->dev); |
554 | pm_runtime_set_active(&pdev->dev); | |
555 | pm_runtime_set_autosuspend_delay(&pdev->dev, 50); | |
556 | pm_runtime_use_autosuspend(&pdev->dev); | |
557 | pm_runtime_enable(&pdev->dev); | |
558 | pm_suspend_ignore_children(&pdev->dev, 1); | |
559 | ||
3a3748db HZ |
560 | err = sdhci_add_host(host); |
561 | if (err) | |
562 | goto remove_sdhc; | |
563 | ||
a027b2c5 ZW |
564 | pm_runtime_put_autosuspend(&pdev->dev); |
565 | ||
3a3748db HZ |
566 | return 0; |
567 | ||
568 | remove_sdhc: | |
a027b2c5 ZW |
569 | pm_runtime_disable(&pdev->dev); |
570 | pm_runtime_put_noidle(&pdev->dev); | |
3a3748db | 571 | xenon_sdhc_unprepare(host); |
bb16ea17 GC |
572 | err_clk_axi: |
573 | clk_disable_unprepare(priv->axi_clk); | |
3a3748db HZ |
574 | err_clk: |
575 | clk_disable_unprepare(pltfm_host->clk); | |
576 | free_pltfm: | |
577 | sdhci_pltfm_free(pdev); | |
578 | return err; | |
579 | } | |
580 | ||
581 | static int xenon_remove(struct platform_device *pdev) | |
582 | { | |
583 | struct sdhci_host *host = platform_get_drvdata(pdev); | |
584 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
bb16ea17 | 585 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); |
3a3748db | 586 | |
a027b2c5 ZW |
587 | pm_runtime_get_sync(&pdev->dev); |
588 | pm_runtime_disable(&pdev->dev); | |
589 | pm_runtime_put_noidle(&pdev->dev); | |
590 | ||
3a3748db HZ |
591 | sdhci_remove_host(host, 0); |
592 | ||
4cc59dff | 593 | xenon_sdhc_unprepare(host); |
bb16ea17 | 594 | clk_disable_unprepare(priv->axi_clk); |
3a3748db HZ |
595 | clk_disable_unprepare(pltfm_host->clk); |
596 | ||
597 | sdhci_pltfm_free(pdev); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
a0fd95b3 HZ |
602 | #ifdef CONFIG_PM_SLEEP |
603 | static int xenon_suspend(struct device *dev) | |
604 | { | |
605 | struct sdhci_host *host = dev_get_drvdata(dev); | |
606 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
a027b2c5 | 607 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); |
a0fd95b3 HZ |
608 | int ret; |
609 | ||
a027b2c5 | 610 | ret = pm_runtime_force_suspend(dev); |
a0fd95b3 | 611 | |
a027b2c5 | 612 | priv->restore_needed = true; |
a0fd95b3 HZ |
613 | return ret; |
614 | } | |
a027b2c5 | 615 | #endif |
a0fd95b3 | 616 | |
a027b2c5 ZW |
617 | #ifdef CONFIG_PM |
618 | static int xenon_runtime_suspend(struct device *dev) | |
a0fd95b3 HZ |
619 | { |
620 | struct sdhci_host *host = dev_get_drvdata(dev); | |
621 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
a027b2c5 | 622 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); |
a0fd95b3 HZ |
623 | int ret; |
624 | ||
a027b2c5 | 625 | ret = sdhci_runtime_suspend_host(host); |
a0fd95b3 HZ |
626 | if (ret) |
627 | return ret; | |
628 | ||
a027b2c5 ZW |
629 | if (host->tuning_mode != SDHCI_TUNING_MODE_3) |
630 | mmc_retune_needed(host->mmc); | |
631 | ||
632 | clk_disable_unprepare(pltfm_host->clk); | |
a0fd95b3 | 633 | /* |
a027b2c5 ZW |
634 | * Need to update the priv->clock here, or when runtime resume |
635 | * back, phy don't aware the clock change and won't adjust phy | |
636 | * which will cause cmd err | |
a0fd95b3 | 637 | */ |
a027b2c5 ZW |
638 | priv->clock = 0; |
639 | return 0; | |
640 | } | |
641 | ||
642 | static int xenon_runtime_resume(struct device *dev) | |
643 | { | |
644 | struct sdhci_host *host = dev_get_drvdata(dev); | |
645 | struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); | |
646 | struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host); | |
647 | int ret; | |
648 | ||
649 | ret = clk_prepare_enable(pltfm_host->clk); | |
650 | if (ret) { | |
651 | dev_err(dev, "can't enable mainck\n"); | |
a0fd95b3 | 652 | return ret; |
a027b2c5 | 653 | } |
a0fd95b3 | 654 | |
a027b2c5 ZW |
655 | if (priv->restore_needed) { |
656 | ret = xenon_sdhc_prepare(host); | |
657 | if (ret) | |
658 | goto out; | |
659 | priv->restore_needed = false; | |
660 | } | |
a0fd95b3 | 661 | |
c6303c5d | 662 | ret = sdhci_runtime_resume_host(host, 0); |
a027b2c5 ZW |
663 | if (ret) |
664 | goto out; | |
665 | return 0; | |
666 | out: | |
667 | clk_disable_unprepare(pltfm_host->clk); | |
668 | return ret; | |
669 | } | |
670 | #endif /* CONFIG_PM */ | |
671 | ||
672 | static const struct dev_pm_ops sdhci_xenon_dev_pm_ops = { | |
673 | SET_SYSTEM_SLEEP_PM_OPS(xenon_suspend, | |
674 | pm_runtime_force_resume) | |
675 | SET_RUNTIME_PM_OPS(xenon_runtime_suspend, | |
676 | xenon_runtime_resume, | |
677 | NULL) | |
678 | }; | |
a0fd95b3 | 679 | |
3a3748db | 680 | static const struct of_device_id sdhci_xenon_dt_ids[] = { |
f75fda37 | 681 | { .compatible = "marvell,armada-ap806-sdhci", .data = (void *)XENON_AP806}, |
7214d792 | 682 | { .compatible = "marvell,armada-ap807-sdhci", .data = (void *)XENON_AP807}, |
f75fda37 MW |
683 | { .compatible = "marvell,armada-cp110-sdhci", .data = (void *)XENON_CP110}, |
684 | { .compatible = "marvell,armada-3700-sdhci", .data = (void *)XENON_A3700}, | |
3a3748db HZ |
685 | {} |
686 | }; | |
687 | MODULE_DEVICE_TABLE(of, sdhci_xenon_dt_ids); | |
688 | ||
471cf454 MW |
689 | #ifdef CONFIG_ACPI |
690 | static const struct acpi_device_id sdhci_xenon_acpi_ids[] = { | |
691 | { .id = "MRVL0002", XENON_AP806}, | |
692 | { .id = "MRVL0003", XENON_AP807}, | |
693 | { .id = "MRVL0004", XENON_CP110}, | |
694 | {} | |
695 | }; | |
696 | MODULE_DEVICE_TABLE(acpi, sdhci_xenon_acpi_ids); | |
697 | #endif | |
698 | ||
3a3748db HZ |
699 | static struct platform_driver sdhci_xenon_driver = { |
700 | .driver = { | |
701 | .name = "xenon-sdhci", | |
7320915c | 702 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
3a3748db | 703 | .of_match_table = sdhci_xenon_dt_ids, |
471cf454 | 704 | .acpi_match_table = ACPI_PTR(sdhci_xenon_acpi_ids), |
a027b2c5 | 705 | .pm = &sdhci_xenon_dev_pm_ops, |
3a3748db HZ |
706 | }, |
707 | .probe = xenon_probe, | |
708 | .remove = xenon_remove, | |
709 | }; | |
710 | ||
711 | module_platform_driver(sdhci_xenon_driver); | |
712 | ||
713 | MODULE_DESCRIPTION("SDHCI platform driver for Marvell Xenon SDHC"); | |
714 | MODULE_AUTHOR("Hu Ziji <huziji@marvell.com>"); | |
715 | MODULE_LICENSE("GPL v2"); |